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Shell Programming and Scripting
Using variable in ls command
Post 302334469 by clx on Wednesday 15th of July 2009 04:16:37 PM
07-15-2009
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LEARN ABOUT OSX
observe
observe(n) observe(n) __________________________________________________________________________________________________________________________________________________ NAME
observe - Runtime debugging output in TkCon SYNOPSIS
observe command cmdname ?maxlevel? observe cdelete cmdname observe cinfo cmdname observe variable varname operation ?args? observe vdelete varname operation observe vinfo varname _________________________________________________________________ DESCRIPTION
This command provides runtime debugging output for variables and commands without the need to edit your code. For variables, the underly- ing mechanism uses trace and dump var. For commands, it renames the observed procedure and uses a special wrapper procedure. WARNING: using this procedure after checkpointing state will result in major problems if you clean state because the renamed (true) commands will be lost. This procedure is experimental. Comments are encouraged. observe command cmdname ?maxlevel? This will create a wrapper command which prints out (using dump) the call stack to the console. maxlevel represents the maximum number of levels of the call stack which will be printed (defaults to 4). observe cdelete cmdname Removes the wrapper around an observed command. observe cinfo cmdname Prints out useless info. observe variable varname operation ?args? Currently a wrapper around trace that uses dump to print out the value of the named variable whenever the specified operation on that variable occurs (must be read, write or unset). observe vdelete varname operation Deletes the trace wrapper around the named variable. observe vinfo varname Prints out trace info about the named variable. SEE ALSO
dump(n), idebug(n), tkcon(1), tkcon(n), tkconrc(5) KEYWORDS
Tk, console, debug COPYRIGHT
Copyright (c) Jeffrey Hobbs <jeff at hobbs.org> TkCon 2.5 observe(n)